/Engine/Source/Runtime/Core/Public/Internationalization/TextFormatter.h
Low-level versions of Format. You probably want to useFText::Format(...) rather than call these directly
static [FText](API\Runtime\Core\Internationalization\FText) Format ( [FTextFormat](API\Runtime\Core\Internationalization\FTextFormat) && InFmt, [TArray](API\Runtime\Core\Containers\TArray)< [FFormatArgumentData](API\Runtime\Core\Internationalization\FFormatArgumentData) > && InArguments, const bool bInRebuildText, const bool bInRebuildAsSource )